package com.sys.object.common.editor;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.simple.JSONObject;

import com.sys.object.common.context.Config;

public class KindUploadServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public KindUploadServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the GET method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		try {//
				// List<MultipartFile> picupload = request.getFiles("file");
				// Gson obj = new Gson();
			JSONObject obj = new JSONObject();
			PrintWriter out = response.getWriter();
			// response.setContentType("application/json; charset=UTF-8");
			response.setContentType("text/html; charset=UTF-8");
			request.setCharacterEncoding("UTF-8");
			response.setCharacterEncoding("UTF-8");
			String savePath = Config.getConfigValue("loadpath").trim();
			String saveUrl = Config.getConfigValue("saveurl").trim();
			HashMap<String, String> extMap = new HashMap<String, String>();
			extMap.put("image", "gif,jpg,jpeg,png,bmp");
			extMap.put("flash", "swf,flv");
			extMap.put("media", "swf,flv,mp4,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
			extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2,pdf");
			// 最大文件大小
			long maxSize = (1024 * 1024 * 15);
			long maxSize_modia = (1024 * 1024 * 300);

			if (!ServletFileUpload.isMultipartContent(request)) {
				out.println(getError("请选择文件"));
				out.flush();
				out.close();
				return;
			}
			// 检查目录
			File uploadDir = new File(savePath);

			if (!uploadDir.isDirectory()) {
				out.println(getError("上传目录不存在"));
				out.flush();
				out.close();
				return;
			}
			// 检查目录写权限
			if (!uploadDir.canWrite()) {
				out.println(getError("上传目录没有写权限。"));
				out.flush();
				out.close();
				return;
			}

			String dirName = request.getParameter("dir");
			if (dirName == null) {
				dirName = "image";
			}
			if (!extMap.containsKey(dirName)) {
				out.println(getError("目录名不正确。"));
				out.flush();
				out.close();
				return;
			}
			// 创建文件夹
			savePath += dirName + "/";
			saveUrl += dirName + "/";
			File saveDirFile = new File(savePath);
			if (!saveDirFile.exists()) {
				saveDirFile.mkdirs();
			}
			SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
			String ymd = sdf.format(new Date());
			savePath += ymd + "/";
			saveUrl += ymd + "/";
			File dirFile = new File(savePath);
			if (!dirFile.exists()) {
				dirFile.mkdirs();
			}

			FileItemFactory factory = new DiskFileItemFactory();
			ServletFileUpload upload = new ServletFileUpload(factory);
			upload.setHeaderEncoding("UTF-8");
			List items = upload.parseRequest(request);
			Iterator itr = items.iterator();
			if (!itr.hasNext()) {
				out.println(getError("没有收到任何文件。"));
				out.flush();
				out.close();
				return;
			}
			while (itr.hasNext()) {
				FileItem item = (FileItem) itr.next();
				String fileName = item.getName();
				long fileSize = item.getSize();
				// 检查扩展名
				if (!item.isFormField()) {
					String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
					// 检查文件大小
					if (extMap.get("media").contains(fileExt) || extMap.get("flash").contains(fileExt)) {
						if (item.getSize() > maxSize_modia) {
							if (item.getSize() > maxSize) {
								out.println(getError("上传影片或动画文件大小150M超过限制。"));
								out.flush();
								out.close();
								return;
							}
						}
					} else {
						if (item.getSize() > maxSize) {
							out.println(getError("上传文件大小5M超过限制。"));
							out.flush();
							out.close();
							return;
						}
					}

					if (!Arrays.<String> asList(extMap.get(dirName).split(",")).contains(fileExt)) {
						out.println(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"));
						out.flush();
						out.close();
						return;
					}

					SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
					String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;
					try {
						File uploadedFile = new File(savePath, newFileName);
						item.write(uploadedFile);
					} catch (Exception e) {
						out.println(getError("上传文件失败"));
						out.flush();
						out.close();
						return;
					}
					obj.put("error", 0);
					obj.put("url", saveUrl + newFileName);
					out.println(obj.toJSONString());
					out.flush();
					out.close();
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private String getError(String message) {
		JSONObject obj = new JSONObject();
		try {
			obj.put("error", 1);
			obj.put("message", message);
		} catch (Exception e) {
			e.printStackTrace();
		}
		System.out.println("json数据====：" + obj.toJSONString());
		return obj.toJSONString();
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
